JPS598806Y2 - Rotating wheel type continuous extrusion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a rotary wheel type continuous extrusion device, particularly to a feeder block in which a shoe or a shoe block of the device holds a member.

Conventionally, a rotary wheel type continuous extrusion device was developed in Japanese Patent Application Laid-Open No. 47-3.
As shown in Japanese Patent No. 1859, an extrusion chamber is constituted by a wheel having a circumferential groove, a shoe that covers a part of the circumferential groove of the wheel, and an abutment that blocks the circumferential groove,
A die insert is disposed on the inner wall of the shoe in contact with the extrusion chamber, and the material in the extrusion chamber is immediately extruded from the extrusion chamber through the die insert as a product, which is known in the art.

This device has a problem in that the maximum cross-sectional shape of the product extruded through the die insert is limited by the circumferential groove width because the diameter of the die hole that determines the product shape cannot be larger than the circumferential groove width.

As a measure to solve this problem, it has been considered to interpose a feeder block between the extrusion chamber and the die.

However, this feeder block is a rectangular member with a convex cross section as shown in FIGS.
The projection 8' is fitted into the wheel circumferential groove in series with the projection 3A of the shoe block 3.

As is clear from the figure, this feeder block 7' is expensive because it has many machined surfaces.

In addition, since the feeder block 7' has a material flow hole 11'' in the protrusion 8' that fits into the wheel circumferential groove, this protrusion tends to be damaged due to fluctuations in material pressure during operation, and if damaged, the product Since the yield rate deteriorates, it is necessary to replace it with a new one each time.

For this reason, there was a drawback that the price of the extruded product rose.

The present invention has been made to eliminate the above-mentioned drawbacks.The feeder block is provided with a projection that fits into the wheel circumferential groove and has a cylindrical shape, and the feeder block is fitted into the shoe or the cylindrical chamber of the shoe block with a clearance fit. By holding the product together, the cross-sectional shape and dimensions of the product to be extruded can be selected without being restricted by the circumferential groove width, and the processing cost of the feeder block can be reduced, reducing the cost of the extruded product. The present invention aims to provide a wheel-type continuous extrusion device.

The embodiment will be described below with reference to Figures 1.2.3. In the figure, 1 is a wheel driven and rotated by a drive device not shown, and the outer periphery of the wheel is provided with a circumferential groove 2 having a U-shaped cross section.

3. 3', 3'' are shoe blocks, and 4 is an abutment. These shoe blocks 3, 3', 3'' and the abutment 4 are both held by a fixed shoe 5, and one of the circumferential grooves 2 of the wheel 1. Cover the section with a lid, and turn the wheel 1
An extrusion chamber is configured to extrude the metal material 6 in cooperation with the extrusion chamber.

Reference numeral 7 denotes a cylindrical feeder block having a protrusion 8 at one end that fits into the circumferential groove 2 of the wheel 1, and is held in a cylindrical chamber 10 of the shoe block 3 together with a die 9.

The feeder block 7 and the cylindrical chamber 10 are fitted with a clearance of about 10 microns.

Reference numeral 11 denotes a material circulation hole that is formed through the feeder block 7, and one end thereof is opened at the end surface of the projection 8.

Since the present invention is constructed as described above, when the rod-shaped metal material 6 is supplied to the circumferential groove 2 of the wheel 1 which is being driven and rotated,
The material 6 is pulled in by the frictional force, and after reaching the abutment 4 where the tip of the material plunges into the circumferential groove 2 and is held there, it is pressurized by the subsequent material and becomes plastic in the extrusion chamber. This becomes the state material 6'.

Thereafter, this material 6' is further pressurized to form material flow holes 11.11 through the feeder block 7.
', joins in the annular chamber 12 formed between the feeder block 7 and the die 9, and is extruded as a pipe product from the circumferential gap between the mandrel 13 and the die hole.

(See Fig. 1) The feeder block 7 and die 9 are
When replaced with the one shown in the figure, products such as solid materials and flat wires will be extruded from the die hole.

As a result of trial extrusion with this structure, the cylindrical feeder block 7 was held tightly in the cylindrical chamber 10 of the shoe block 3, and the feeder block 7 was fitted into the cylindrical chamber 10 with a clearance of about 10 microns, so that the feeder block 7 could not be used even during operation. It was confirmed that the fitted state between the protrusion 8 of the block 7 and the circumferential groove 2 remained unchanged and could be maintained in a predetermined state.

In addition, as shown in FIGS. 1 and 2, if the feeder block 7 is provided with two through-type material flow holes 11 and 11' having different cross-sectional areas, the feeder block 7
There is also the advantage that a pipe with a uniform thickness can be extruded by equalizing the pressure of the material 6', or a pipe with an uneven thickness can be extruded by a pressure difference, simply by rotating and converting the material 6'.

As described above, in this invention, the material in the extrusion chamber is supplied to the die via the feeder block, so the cross-sectional shape and size of the extruded product can be adjusted by changing the die and feeder block. In addition to being able to make the feeder block larger than the width, the cylindrical shape of the feeder block greatly reduces the number of processing steps compared to conventional feeder blocks, making this feeder block, which is frequently replaced during operation, inexpensive. This has the great effect of reducing the cost of extruded products.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the rotary wheel type continuous extrusion device according to the present invention, Fig. 2 is a view of the feeder block, shoe block, and shoe taken along line II in Fig. 1, and Fig. 3 is a diagram showing other Figures showing the embodiment, Figures 4 and 5 show conventional examples,
FIG. 4 is a view in which a feeder block and a die are assembled into a shoe block, and FIG. 5 is an external view taken along line V in FIG. 4. 1...wheel, 2...circumferential groove, 3...
... Shoe block, 7 ... Feeder block, 8 ... Protrusion, 10 ... Cylindrical chamber.

Claims (1)

[Scope of utility model registration request] A feeder block having a cylindrical shape is provided with a protrusion that fits into the circumferential groove, and the feeder block is fitted and held in a cylindrical chamber formed in the shoe or shoe block together with a guide,
A rotating wheel type continuous extrusion device characterized in that the feeder block fits into the cylindrical chamber of the shoe or shoe block in a loose fit.